CODEWITHSUNDEEP
google-app-enginehttp-headers
Rio
Rio

Reputation: 1918

How to prevent App Engine from merging multiple headers with the same name?

App Engine seems to always merge multiple headers with the same name into one. For example if one sets this in CGI

print "Set-Cookie: foo=bar"
print "Set-Cookie: spam=egg"

What is actually delivered to the browser is

Set-Cookie: foo=bar, spam=egg

which is of course wrong. The correct solution is either

Set-Cookie: foo=bar; spam=egg

or not merge them at all. How can I do that? Thanks!

Upvotes: 2

Views: 227

Answers (1)

Ian Charnas
Ian Charnas

Reputation: 466

I believe GAE is doing the correct thing, actually. Multiple cookies are separated by commas, not semi-colons. The semi-colon is used to separate parameters of a single cookie. I don't have time to look up the RFC link, but you can see examples all over the internet:

CODE

import httplib
c = httplib.HTTPConnection("www.facebook.com")

myHeaders = {
    'Content-Type': 'text/html',
    'User-agent': 
"Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12",
    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
    'Keep-Alive': '300',
    'Connection': 'keep-alive',
    'Accept-Language': 'en-us,en;q=0.5',
    'Accept-Charset': 'ISO-8859-1,utf-8;q=0.7,*;q=0.7',
}

c.request("GET", "/login.php", body="", headers=myHeaders)
r = c.getresponse()
print r.getheaders()

RESULTS

[ ... other headers snipped ...

('set-cookie', 'datr=5j9DTSaOPEd5Rxc9X23IB7KB; expires=Sun, 27-Jan-2013 22:15:02 GMT; path=/; domain=.facebook.com; httponly, lsd=0l0sd; path=/; domain=.facebook.com, reg_fb_gate=http%3A%2F%2Fwww.facebook.com%2Flogin.php; path=/; domain=.facebook.com, reg_fb_ref=http%3A%2F%2Fwww.facebook.com%2Flogin.php; path=/; domain=.facebook.com')

]

Hope this is helpful Ian

Upvotes: 1

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